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Unable to process message

Hello. I moved mongodb from the old greylog to the new one and got this error. How can I fix it?


Log file:
2021-10-07T12:07:27.087Z WARN [ProcessBufferProcessor] Unable to process message <23696ff0-2767-11ec-9cd8-001a0000005c>: java.lang.IllegalStateException: index set must not be null! (stream id=000000000000000000000001 title="All messages") 2021-10-07T12:07:27.087Z WARN [ProcessBufferProcessor] Unable to process message <23696ff2-2767-11ec-9cd8-001a0000005c>: java.lang.IllegalStateException: index set must not be null! (stream id=000000000000000000000001 title="All messages") 2021-10-07T12:07:27.087Z WARN [ProcessBufferProcessor] Unable to process message <23696ff3-2767-11ec-9cd8-001a0000005c>: java.lang.IllegalStateException: index set must not be null! (stream id=000000000000000000000001 title="All messages") 2021-10-07T12:07:27.087Z WARN [ProcessBufferProcessor] Unable to process message <23696ff4-2767-11ec-9cd8-001a0000005c>: java.lang.IllegalStateException: index set must not be null! (stream id=000000000000000000000001 title="All messages") 2021-10-07T12:07:27.087Z WARN [ProcessBufferProcessor] Unable to process message <23696ff5-2767-11ec-9cd8-001a0000005c>: java.lang.IllegalStateException: index set must not be null! (stream id=000000000000000000000001 title="All messages") 2021-10-07T12:07:27.087Z WARN [ProcessBufferProcessor] Unable to process message <23696ff8-2767-11ec-9cd8-001a0000005c>: java.lang.IllegalStateException: index set must not be null! (stream id=000000000000000000000001 title="All messages") 2021-10-07T12:07:27.087Z WARN [ProcessBufferProcessor] Unable to process message <23696ff7-2767-11ec-9cd8-001a0000005c>: java.lang.IllegalStateException: index set must not be null! (stream id=000000000000000000000001 title="All messages") 2021-10-07T12:07:27.087Z WARN [ProcessBufferProcessor] Unable to process message <23696ffa-2767-11ec-9cd8-001a0000005c>: java.lang.IllegalStateException: index set must not be null! (stream id=000000000000000000000001 title="All messages") 2021-10-07T12:07:27.087Z WARN [ProcessBufferProcessor] Unable to process message <23696ff9-2767-11ec-9cd8-001a0000005c>: java.lang.IllegalStateException: index set must not be null! (stream id=000000000000000000000001 title="All messages")

I used mongodump to export dashboard, and other setting in my new graylog. Previous version of graylog is 3.X, now 4.X

Hello

So the index set that is attached to All Messages can not be null.
The first step is there somewhere you should check if the stream has a index set that is present, given as location to store messages.

Maybe this documentation will help.

Have you tried to recalculate/rotate your index?